Drifting-valve for locomotives.



J. BILLING-HAM & 0. F. KAHLER. DRIFTING VALVE FOE LOCOMOTIVES.

K APPLICATION rum APR. 24 1914. 1 i 1 Q, 1 @9 Patented Sept. 29, 191 1 2SHEETS- SHEET 1.

J. BILLINGHAM & O. P. KAHLER. DRIFTING VALVE FOR LOCOMOTIVES.

APPLICATION FILED APR. 24, 1914 Patented Sept. 29, 1914.

g. j/c'a v I I 3 WITNESSEzi/ "preferably, as shown, located in the cabof lower side of the piston, 13, of the admission the locomotive, andcomprises a lower pistonvalve mechanism, will raise said piston,chamber; 11], to therren ovable bottom plate, thereby unseating theadmission valve, 12, 11:, of which, -the,,flu 1d pressure delivery andadmitting a limited volume of steam 5 pipe, 6, leadingfrom the vacuumpiston cas-J through the pipes, 14 and 17 to the distriing, 3, beforedescribed, is connected, and an butio rvalve chests and the cylinders.This upper valve chamber, 11, which communiadmission of steam willcontinue during the castes with the piston chamber through 'a driftingof the locomotive, therebycountercentral passage, and is closed at topby a acting the tendency to the formatibn of a 10 removable cap, 11?, Apartition, 11, exvacuum' in the cylinders, and also, which is tendsacross the ,valve chamber, and has of material importance, efiecting thelubriformed within it a; central opening which is cation of thecylinders by the admission of controlled by a steam admission valve, 12,steam and of the oil which it carries with it seated in the partition,around the opening from the lubricating pipes, which are- 5 thereof, andlocated above a stem, 12, which located adjacent to the inlets of thebranches extends into the piston chamber, 11, within of the pipe, 17.whicli itcarries a properly packed piston, It is, of course,particularly desirable, if 13,01; substantially larger diameter than thenot absolutely essential to conditions of 4 valve l'2, and fitting saidchamber. Asmall safety, that the admission of steam to the a piston, 13,on theistem,12, fits in the pascylinders through aconduit independent ofsagebetween the valve and piston chambers, that' which is controlledbythe throttle and prevents flow bf steam from the former valve, whichhas been effected while driftto thefglatter. The valve chamber, "11", ising, should be stopped when the throttle 1 connected, above theadmission valve, with valve is closed and the locomotive is standthesteam space oil the locomotive boiler, by ing. This cessation ofindependent steam Y a pipe, ,14, which referably leads to a.turadmission is, under the condition last stated, et or sinall steam!dome, 15, on the boiler, automatically efiec'ted? injthe operation ofand is controlled ,by a manually operable our improvement,' by thebuilding up 9; in- Valve, A lim tleads'flsm V31??? ll l i iiihfnpressurejinthe c dinders i.due ,t0 @soichanibeijlheloiv theadmissionwalve,tdeach the admission of steam thereto through the of'thedistribution valve chests, 2, to which pipe, 17. As soonas the cylinderpressure it is connected, on the admission side of the exceeds that ofthe atmosphere, the piston, 7,

valves, by a T and branches, as shown in will be depressed, the airbelow it being ex- 3; the piston, 9,

I .Fig. 1. A-clieck ozl' non-return valve, 18, of hausted through theport,

-35 thg crdina'ry construction, is located in the will'cut ofi'communication between the fluid 17, to'preventbackward flow of steampressure supply pipe, 4, and the fluid presto the valvechamber, 11. 1 4sure delivery pipe, 6; and the-fluid pres-' p In the operationf of themechanism abovesure in the latter pipe will be exhausted described, theste'anii supply valve, 16, hav therefrom through the port, 3 Thepreslo-img been opened, and the locomotive runsure on the lower side ofthe piston, 13, of ning under steam, 1%. e with its throttle theadmission valve mechanism, being therevalve open, the admission valve,12, is held by relieved, the steam pressure on the 11 per to its seat bythe steam pressure above it, side of the admission valve, 12, will orceand the pistons, 7, 8, 9, and 10, of thevacit to its seat, and thesupply of steam to the uum pistonmechani in, being subject to cylinderswill be cutoff, and remain cut off,

valve chest'pressure, acting on the upper while the locomotive isstanding. side of the piston, 7, remain in the ordinary Experience w thsuperheatedsteam loconormall seated positions'shown in Fig. 3. motiveshas developedthat 'difiiculty has f When t 'e locomotive is drifting orrunbeen experienced by'the carboniz ng of 01 .ning with its throttleclosed, a partial vacin the cylinders, and that, when drift ng, uumwill,by the reciprocation of the pistons there is a gum-my and sticky depositof oil in the cylinders, be ormed therein, in the on the cylinders, andthat the adhesion, to distribution valvechests on the admission thisgummy deposit, of dirt drawn nto the side of the valves,-and in thesteam supply cylinders when the engine --is drifting to connectionsleading from the throttle valve any extentwith throttle-entirely closed,conto thedistribution valve chests. The res- 'verts it into acompositionwhich rapidly sure previously acting on the upper si e of wears away thepacking. rings and piston {the iston, '7, will be CPII'GSPOIIdlDglY re-.heads. It has also been found in practice duce ,"and atmosphericpressure, acting on that a' constant small "admission of steam to thelowen'side of said pistonthrough'the the cylinders tends'to insureproper lubriport, 3, will raise it,'and the connected pis cationandprevcnt the carbonizing of the Ytons, 8, 9, and lO therebybringingthe flpid o l, and that good results have'been obtained pressure supplypipe, 4, into commun cation bykeeping the throttle slightly open when.v'w'iththe fluid pressure; delivery pipe, 6. the enginewasdrifting,;"-The ob ections to "The pressure delivered from said pipe tothe this practice are, "however manifest to those skilled in theoperation of locomotives',.and it will be equally obvious that thesewill be avoided by the application of ourinvention, in the operationofwhich steam is automatically admitted to the valve chests andcylinders, entirely independently of the throttle valve, when-the engineis drifteffected may be connected directly to, the cylinders, as shownin Fig. 4, The manner.

of'operation and result attained-by our inventlon are the same whetherthe admission be direct, or indirectly through the valve chests as set-for'th,-and the steam supply connections 'to the cylinders "are themechanical equivalents of similar connections to the valve chests. Theadoption of one or the other location of connection is a matter withinthe discretion and ordinary-skill of the constructor,'and the specificlocation is not an essentlal of our invention.

The vacuum piston mechanism hereinbe- 5 fore. set forth, is not, in andof itself,

claimed asof our present invention, and con-. stitutes the subjectmatter of a divisional application filed July 17-, 1914, Ser, No.

of valve chest pressure, governing the application of pressure from saidindependent source to said steam supply controlling means.

We claimas our invention and desire to secure by Letters Patent v .1. Ina drifting valve mechanism for loco motives', the combination of meansfor con- 7 trolling the supply of steam from a boiler to a distributionval ve chest, independently of the main steam supply pipe, a source offluid pressure pipe, and mechanism, actuated'by variation for.automatically 2. In a drifting valve mechanism for'locomotives, thecombination of a valve controlling the supply of steam from a boiler toa dlStJlblltlOIl' valve chest, independently of the main steam supplypipe, means for actuating said valve bythe application, in the I fluidpressure yacuuminclosing casing,

its opposite, sides to atmospheric and distriipply independent of said"opposite direction, of boiler supply steam and of fluid pressure from asource independent of the main steam supply pipe, and mechanism,actuated by diflerences of valve chest pressure, for controlling thesupply of from the independent source to the valve actuating means.

- 3. In a drifting valve mechanism for locomotives, the combination of avalve control lin'g the supply of steam from a boiler to a distributionvalve chest, independently of the main steam supply pipe, means for.unseating said valve by fluid pressure from a source independent of saidpipe, and mechanism, actuated by a reduction of valve chest pressure,for supplying fluid pressure to said unseating means.

4, m a drifting valve mechanism for locomotives, valve controlling thesupply of steam from aboiler to a distribution valve chest,independently of the main" steam supply pipe,

anfactuating piston, oflarger diameter than.

said valve and connected thereto, a source of fluid pressure} supplyindependent of the main steam su ply pipe and mechanism,

actuated by di erences of valve chest presfluid pressure from theindependent; source to the, actuating iston. I a

5. Ina rifting valve mechanism for loco sure, for controlling the supplyof motives, the combination of an admission valve mechanism comprisingan mclosmg the combination of an admission.

casing, a valve fitted thereinand, controlling communication between aboiler supply ing to a distribution valve chest, and a piston of lar rdiameter connected to the' 'steam pipe and a delivery. steam pipe lead-'valve; a source'of fluid pressure independent of the ma n steam supplypipe, and a a piston therein subject on nicatlon fluid pressure and the"piston of. the admission valve mechanism.

JOSEPH niigninennn. CHARLES -F.- KAHLER;

Witnesses W. S. FRAME,

' J. D. FINN.

Histonmechanism comprislng an" between the independent source of

